watts_strogatz_graph¶
- watts_strogatz_graph(n, k, p, seed=None)[source]¶
Return a Watts–Strogatz small-world graph.
Parameters: - n (int) – The number of nodes
- k (int) – Each node is joined with its k nearest neighbors in a ring topology.
- p (float) – The probability of rewiring each edge
- seed (int, optional) – Seed for random number generator (default=None)
Notes
First create a ring over n nodes. Then each node in the ring is joined to its k nearest neighbors (or k - 1 neighbors if k is odd). Then shortcuts are created by replacing some edges as follows: for each edge (u, v) in the underlying “n-ring with k nearest neighbors” with probability p replace it with a new edge (u, w) with uniformly random choice of existing node w.
In contrast with newman_watts_strogatz_graph(), the random rewiring does not increase the number of edges. The rewired graph is not guaranteed to be connected as in connected_watts_strogatz_graph().
References
[1] Duncan J. Watts and Steven H. Strogatz, Collective dynamics of small-world networks, Nature, 393, pp. 440–442, 1998.